I have assembled an installable package to install Lua5.1 on the Iliad. Lua is a scripting language. It is lean and mean, while being a full fledged and elegant language. It has a small memory footprint. The total install size is less than 1MB! It can do xml and network stuff. It is great to have it running on the Iliad :-)
I'll post a nice example application later (a small webserver running on the Iliad).
More details (and the sources for those who want to build the package themselves) can be found at https://dev.mobileread.com/trac/luailiad/wiki
The package file can be download here: https://dev.mobileread.com/dist/hansel/luailiad/
EDIT 20090404: new versions: luailiad-1.5.0, lgob-0.1.5
EDIT 20090917: new versions: lgob-iliad-0.1.7.ipk (based on lgob-9.09)